\[ \left (x^2-1\right ) y''(x)-\left (x^2-x\right ) y(x)-(3 x+1) y'(x)=0 \] ✓ Mathematica : cpu = 0.0768598 (sec), leaf count = 50
\[\left \{\left \{y(x)\to e^{-x-2} \left (c_2 (x+1)^2 \text {Ei}(2 (x+1))+e^2 \left (c_1 (x+1)^2-2 c_2 e^{2 x}\right )\right )\right \}\right \}\]
✓ Maple : cpu = 0.077 (sec), leaf count = 41
\[ \left \{ y \left ( x \right ) ={\it \_C2}\,{{\rm e}^{-x-2}} \left ( 1+x \right ) ^{2}{\it Ei} \left ( 1,-2\,x-2 \right ) +{\it \_C1}\,{{\rm e}^{-x}} \left ( 1+x \right ) ^{2}+2\,{{\rm e}^{x}}{\it \_C2} \right \} \]